S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600
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Mercedes Benz S550 no crank issue

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Old 09-22-2021, 04:04 PM
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Benz S550
Mercedes Benz S550 no crank issue

I’m looking to see if someone could help me out with my benz . I am stuck with this issue for past 5 months trying to get it working. The car does not crank and there’s no ground to the starter relay and the fuel pump relay batteries are good and starter was bypassed and it crank.

History about the car. It was taken to car wash and the engine bay was washed by the previous owner and he drove it home the next morning he tried to start the car the car did not crank but all the light comes ON the dash.I replace the battery from the dealership both the trunk and the starter battery.

I tried to bypass the starter relay and what I noticed was the starter relay was getting hot and I noticed the fuel pump relay in the trunk was really warm. Please help me with this issue.

I have also attached some Diagnostic report which was done on the car.









Last edited by salilarora; 09-22-2021 at 05:05 PM.
Old 09-24-2021, 07:22 AM
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Old 09-24-2021, 05:39 PM
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W221 s550
I bought trailblazer 2013 last year and a scan tool gave me so many errors. I knew that because the battery.

New batteries. Clean any corroded /rusted wire plugs. Erase errors.

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